The North Pole is the northernmost point on Earth, lying diametrically opposite the South Pole. It defines geodetic latitude 90° North, as well as the direction of True North. At the North Pole all directions point south; all lines of longitude converge there, so its longitude can be defined as any degree value. Polar bears are believed rarely to travel beyond about 82° North owing to the scarcity of food, though tracks have been seen in the...